ASN 3000 Series NRV is the system without a vavle as it only allows water to pass through and does not require any backwashing or rinsing.
ASN 3100 Series Carbon Backwash is the system with a valve to be programmed based on customers' needs.
Clean, Clear Odor Free Water
Economical Reduction of Chlorine, Chloramines and Other Bad Taste & Odors Once water arrives safely at your home there is no further need for disinfectants. In fact they are undesirable! Disinfectants cause taste and bad odor, dry skin, damage plumbing, and can produce potentially harmful by-products.
The amount of media within will vary depending on what the system needs to remove.